1
GATE CE 2008
+2
-0.6
A pre-tensioned concrete member of section $$200\,\,mm \times 250\,\,mm$$ contains tendons of area $$500\,\,m{m^2}$$ at the centre of gravity of the section. The prestress in tendons is $$1000\,\,N/m{m^2}.$$. Assuming modular ratio as $$10,$$ the stress $$\left( {N/m{m^2}} \right)$$ in concrete is
A
$$11$$
B
$$9$$
C
$$7$$
D
$$5$$
2
GATE CE 2007
+2
-0.6
A concrete beam of rectangular cross-section of size $$120$$ $$mm$$ (width) and $$200$$ $$mm$$ (depth) is prestressed by a straight tendon to an effective force of $$150$$ $$kN$$ at an eccentricity of $$20$$ $$mm$$ (below the centroidal axis in the depth direction). The stresses at the top and bottom fibres of the section are
A
$$2.5\,\,N/m{m^2}\,\,\left( {compression} \right),\,\,10\,N/m{m^2}\,\left( {compression} \right)$$
B
$$10\,\,N/m{m^2}\,\,\left( {tension} \right),\,\,2.5\,N/m{m^2}\,\left( {compression} \right)$$
C
$$3.75\,\,N/m{m^2}\,\,\left( {tension} \right),\,\,2.75\,N/m{m^2}\,\left( {compression} \right)$$
D
$$2.75\,\,N/m{m^2}\,\,\left( {compression} \right),\,\,3.75\,N/m{m^2}\,\left( {compression} \right)$$
3
GATE CE 2005
+2
-0.6
A concrete beam of rectangular cross section of $$200\,\,mm \times 400\,\,mm$$ is pre-stressed with a force $$400$$ $$kN$$ at eccentricity $$100$$ $$mm.$$ the maximum compressive stress in the concrete is
A
$$12.5\,\,N/m{m^2}$$
B
$$7.5\,\,N/m{m^2}$$
C
$$5.0\,\,N/m{m^2}$$
D
$$2.5\,\,N/m{m^2}$$
4
GATE CE 2004
+2
-0.6
A simply supported prestressed concrete beam is $$6$$ $$m$$ long and $$300$$ $$mm$$ wide. Its gross depth is $$600$$ $$mm.$$ It is prestressed by horizontal cable tendons at a uniform eccentricity of $$100$$ $$mm.$$ The prestressing tensile force in the cable tendons is $$1000$$ $$kN$$. Neglect the self weight of beam. The maximum normal compressive stress in the beam at transfer is
A
Zero
B
$$5.55\,\,N/m{m^2}$$
C
$$11.11\,\,N/m{m^2}$$
D
$$15.68\,\,N/m{m^2}$$
GATE CE Subjects
Construction Material and Management
Geomatics Engineering Or Surveying
Engineering Mechanics
Transportation Engineering
Environmental Engineering
Geotechnical Engineering
Fluid Mechanics and Hydraulic Machines
General Aptitude
EXAM MAP
Medical
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